Increase the default Material alpha scissor threshold to 0.5

[Calinou]

This matches the glTF specification and the Label3D default. This provides better transparency for distant objects, preventing them from becoming too opaque at a distance.

[akien-mga]

Might be worth linking to the relevant part of the glTF spec to document why this value is used (in the constructor)?

[Calinou]

Might be worth linking to the relevant part of the glTF spec to document why this value is used (in the constructor)?

Done.

[reduz]

The problem with 0.5 instead of 0.99 is that when filter is used for something like pixel art in 3D, you will see some extra outline that will generally be unintended.

[reduz]

But looking at the current value being 0.05 I have no idea. Would be nice to research why the current value is where it is.

[Calinou]

is that when filter is used for something like pixel art in 3D

I think there are other problems if you're using filter with pixel art in 3D :slightly_smiling_face:

(Unless you're using a shader like Smooth pixel filtering, of course.)

[clayjohn]

Just needs a rebase, the actual change was merged already in your other PR https://github.com/godotengine/godot/pull/54028 which (strangely enough was approved by reduz one week before commenting on this PR

For future reference 3.x uses a default of 0.98, it was changed to 0.05 in https://github.com/godotengine/godot/pull/40364 and no comment was made about why it was changed.

[Calinou]

Indeed, I forgot I had made a PR about this last year…

I've rebased this PR to make it work purely as a documentation change.

[akien-mga]

Thanks!